Doorknob fastener



Aug. 4, 1942.

W. R. SCHLAGE DOOR KNOB FASTENER Filed March 12, 1941 2 Sheets-Sheet .1

IN VEN TOR.

' ATTOR Y.

g- 4, 1942- w. R. SCHLAGE 2,291,655

DOOR KNOB FASTENER Filed March 12, 1941 y '2 Sheets-Sheet 2 2'2- I F v v 5 REC? FFMW 3kg I. F A W INV NTOR.

BY rmmv Patented Aug. 4, 1942 UNITED STATES PATENT 1 OFFICE Walter R. Schlage, Burlingam'e,

to Schlage Lock Company,

Calif m: San Francisco.

Calif., a corporation of California Application March 12, 1941, Serial No. 382,878

2 Claims.

This invention relates to a door knob fastener, and especially to a modified form of the fastener disclosed in my former Patent No. 2,007,350, entitled "Demountable knob and cylinder lock, issued July 9,1935.

In the above mentioned patent, a knob fastener is disclosed which is adapted to be locked or dogged by a key mechanism mounted in the outer knob to prevent removal of the knob except by an authorized person who has possession of the proper key. The present patent discloses a knob fastener which is applicable to both the inner and the outer knob, and which is adapted to be dogged or locked by key-actuated means in the outer knob, and by manually actuated means in the inner knob; and further, to provide a knob fastener which is actuated by a spring and a detent, and in which the spring and detent also function to yieldingly retain the manual member 'in one or vmore of a number of predetermined positions,

The invention is shown by way of illustration in the accompanying drawings, in which:

Fig. 1 is 'a horizontal section of a door lock, showing it mounted in a door;

Fig. 2 is a section similar to Fig. 1 showing the dogging members in'released position;

Fig. 3 is a cross section-taken on line III-+111.

of Fig.

Fig. 4 is a cross section taken on line IV-IV of Fig. 1; and

Fig. 5 is a vertical section taken on line V- V of Fig. 1.

Referring to the drawings in detail, and particularly to Fig. 1, A indicates a suitable form of lock housing, in which is slidably mounted a lat'ch bolt 2.

Formed on opposite sides of the housing are spindle bearings 3 and 4, and extending through and supported in said bearings is a hollow spindle 5, on one end of which is secured a knob 6, which will hereinafter be referred to as theinner knob, and on the opposite end of which is secured a knob' I which will hereinafter be referred to as the outer knob.

Insertable through the outer knob and into the outer end of the spindle 5 is the cylinder 8 of a suitable form of pin or plate tumbler lock, and formed on the inner. end of said cylinder is a lug 9, the function of which will hereinafter be described. Drilled adjacent the inner end of the cylinder 8 is a hole l0 in which'is mounted a spring H and a detent l2. Formed on opposite sides of the spindle, and in alignment with the hole l0, are holes I3 and I4; also formed in the knob,'in alignment with the 'hole II, is a hole which is adapted to receive the outer end of a pin Hi. This pin is mounted in the spindle, and its inner end is shouldered to limit outward movement. This shoulder is of the same diameter as the hole l0, so as to permit the pin it to be pushed inwardly against the detent II in order l0 and the, detent I! will align with the head,

on the pin 16, and it may then be depressed sufliciently to permit the knob to be released and removed. The knob under normal conditions is secured against endwise removal-by the pin or latch l6, and it cannot be released except by a person in cylinder 8 must be rotated until the detent aligns 4 with the head of the latch i6.

The inner knob 6 is secured against removal by an identical form of latch or pin; such as shown at I6a, and it is held in latching position by a rod l8. Thisrodfills the inner space of the tubular spindle, but it is rotatable therein. Its outer end projects through the inner knob Sand is provided with a thumbpiece or turnpiece l9 to permit rotation of the rod. The rod has a crosshole |0a formed therein, and mounted therein is a spring and detent 1211 (see Fig. 4). When the rod I8 is rotated a half revolution the detent will register with the head of the pin Ito and in that position the pin or latch may be.depressed to release the inner knob.

The rod l8 serves another function besides that of a retainer for the spring and detent. By referring to Fig. 1, it will be noted that the sides and these dogs are normally urged by a spring 24 into a pair of openings 25 formed in the spindle (see Fig. 2). When the dogs are in the openings the spindle is dogged against rotation, and when the spindle is dogged against rotation, retraction of the latch bolt 2 can not take place. Any at- IS tempt to rotate either the inner-or outer knob IS in the knob. In the position possession of the proper key..as thev tion the lug 9 to engage the lug 9a and cause rotation will therefore be of no avail when the dogs 23 assume the position shown in Fig. 1, as the knobs are secured to the spindle and the spindle can not rotate as it is dogged. The dogs may, however, be moved to the retracted position shown in Fig. 2 either by rotating the rod IS a quarter revolution, by means of the turnpiece l3; or it may be rotated by means of the insertion 01' a key, as the insertion of a key will permit rotaof the cylinder, and such rotation will cause of the rod, and the dog actuator or plate 20 will thus move the dogs either into or out 01' dogging position, and when moved to the position shown in Fig. 2 the spindle may be rotated by either knob to retract the latch bolt.

Retraction of the latchbolt is accomplished by a roll-back member 30 formed on the spindle; this engages with a pair 01 shoulders 3| (see Fig.

'5) formed at the rear end of a retractor plate 32. This plate in turn is connected with the latch bolt 2, and that is the manner in which the latch bolt is retracted. The latch bolt is normally held in extended position by the springs 2a, and the dogs 23 are normally held in dogging position by the spring 24,

The spring actuated detents l2 and Ma serve two functions, first that of projecting the pins or latches l6 and Ilia into engagement with the respective knobs, and secondly they function as yieldable stop members to position either the cylinder 8 of the key mechanism or the rod l8 which operates the dog acutator 20. When the turnpiece IS on the rod assumes a horizontal position, the actuator 20 assumes a vertical position and the dogs 23 a dogging position. When the rod I8 is turned by the turnpiece i9 until this assumes a vertical position, the actuator 20 will assume a horizontal position, as shown in Fig. 2, and the dogs 23 will assume their retracted position where rotation of the'spindle will be permitted. The hoIesJshOWn at 35 and 36 in Fig. 4 are provided for the purpose of receiving the detent In, and thus yieldingly secure the turnpiece and the rod H3 in one position or another.

The hole yieldingly sition.

The lock shown in the present instance is I3, in cooperation with the detent, secures the cylinder 3 in looking po- 'ing the rotatable cally described for purposes of illustration, I

wish it understood that changes may be resorted to within ,the scope of the appended claims.

Having thus described my invention, what I claim and desire to latch member extending through the spindle it against removal, the spindle, said member having one portion preventing depression oi! the latch and having a recess formed therein at another portion to permit depression of the latch, a spring actuated detent mounted in the recess, and means for rotatmember to register the recess and detent with the latch, said detent when in register with the latch maintaining the latch radially and into the knob to secure projected but permitting manual depression of the latch.

2. In a structure of the character described, a hollow spindle, a knob mounted thereon, a depressible latch member extending readially through the spindle and into the knob to secure it against removal, a rotatable member within the spindle, said member having one portion preventing depression of the latch and having a recess formed therein at another portion to permit depression of the latch, a spring actuated detent mounted in the recess, means for rotating the rotatable member to register the recess and detent with the latch, said detent when in register with the latch maintaining the latch projected but permitting manual depression of the latch, and a recess formed in the inner surface of the hollow spindle with which the detent is adapted to register in another position of the rotatable member, said detent yieldingly resisting rotation of the rotatable member.

WALTER R. SCHLAGE.

a rotatable member within 

